Garden Pests and Diseases: Michelia Alba needs help, 2 by JimmyDean

JimmyDean wrote:
I've had this tree for a couple of years. It was in a pot and I planted it 2 years ago.
It seems to always have spotting or brown edged leaves, which eventually fall off.
It also can look quite good for a while.
It is watered twice weekly with 5 1 gallon drippers for 90 minutes.
I occasionally add sulphur to acidify the soil and sometimes that seems to help.
Lately the leaves seem to droop even after watering.
Any thoughts would be appreciated.

JD